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Business Overview	12 Months Ended
Business Overview	Dec. 29, 2012
Accounting Policies [Abstract]
BUSINESS OVERVIEW	BUSINESS OVERVIEW Cadence Design Systems, Inc., or Cadence, develops electronic design automation, or EDA, software, hardware, verification intellectual property, or VIP, and design intellectual property, or Design IP. Cadence licenses software, VIP and Design IP, sells or leases hardware technology, provides maintenance for its software, VIP and Design IP and hardware and provides engineering and education services to help manage and accelerate product development processes for electronics. Cadence's customers use its products and services to design and develop complex integrated circuits, or ICs, and electronics systems.